Material Randomization

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In this example we demonstrate how to switch materials.

Usage

Execute in the BlenderProc main directory:

blenderproc run examples/advanced/material_randomizer/main.py examples/resources/scene.obj examples/advanced/material_randomizer/output

  • examples/advanced/material_randomizer/main.py: path to the main python file to run.

  • examples/resources/scene.obj: path to the object file with the basic scene.

  • examples/advanced/material_randomizer/output: path to the output directory.

Visualization

Visualize the generated data:

blenderproc vis hdf5 examples/advanced/material_randomizer/output/*.hdf5

Implementation

# Collect all materials
materials = bproc.material.collect_all()

# Go through all objects
for obj in objs:
    # For each material of the object
    for i in range(len(obj.get_materials())):
        # In 50% of all cases
        if np.random.uniform(0, 1) <= 0.5:
            # Replace the material with a random one
            obj.set_material(i, random.choice(materials))

Collect all materials that were previously loaded. For each object replace their materials with a chance of 50% with one of the collected materials.